LeapForce and Appen Butler Hill are two major firms that hire search engine evaluators. (Appen also hires social media evaluators, who analyze the relevancy of a company’s social media news feed.) Appen has potential employees complete an application (project-specific screenings and language proficiency tests may also be required), and LeapForce asks candidates to take and pass a three-part qualifying exam. Both companies also require that you have a new computer, smartphone, high-speed internet, anti-virus software, certain operating systems and be a little internet-savvy.
I also recommend FlexJobs for finding more home data entry jobs. With that site, you can regularly search legitimate work at home jobs for data entry and other industries. Every job lead is guaranteed scam-free, and it's the only membership-based jobs site I currently use and trust. Their listings are updated 5-6 times per week, and they are plentiful. You can currently get 30% off a subscription using promo code AFFILPROMO.
The online application process for these jobs—or perhaps “gigs” is the better word, since they're all for independent contractors—is pretty simple and straightforward with very little required of candidates. Some of these opportunities—like the micro-jobs—you could very well apply and start the same day. And these jobs require very little commitment and can typically be done on your own schedule.